Comparison of contrast-enhanced fat-suppressed T1-3D-VIBE and T1-TSE MRI in evaluating anal fistula

Zhao, Jinmin; Lu, Fang; Wang, Qing-Ming; Lü, Hong; Liu, Mengxiao; Zhang, Zhongshuai; Gong, Zhigang; Huang, Yanwen; Yang, Wei; Zhan, Songhua; Yang, Shouguo

doi:10.1007/s00261-022-03661-8

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…In another study by Zhao et al, they compared the CE FS 3D T1-weighted VIBE and FS T1-weighted turbo spin echo (TSE) sequence in characteristics of anal fistula. 18 They concluded that 3D T1 VIBE was more accurate and more valuable than 2D TSE T1 images in the assessment of anal fistula on evaluating the position of internal opening, secondary tracts, and classification of the complex fistula.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Contrast-Enhanced 3D Imaging with 2D Imaging in the Evaluation of Perianal Fistula at 3T: A Prospective Observational Study

KV,

Arunachalam,

Sherene

et al. 2023

Indian J Radiol Imaging

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Introduction Perianal fistula and its recurrence is a challenging entity for surgeons. It is a well-establi1shed fact that magnetic resonance imaging (MRI) findings influence surgical procedures and reduce the rate of recurrence. In this study, we assessed the contrast-enhanced (CE) three dimensional T1 sequences [sampling perfection with application optimized contrast using different flip angle evolution (SPACE) and volumetric interpolated breath-hold examination (VIBE)] in a 3T MRI system to evaluate perianal fistulas and compared them with two-dimensional (2D) sequences. Materials and Methods Forty-four patients (mean age, 38.8 ± 15.3 [standard deviation]; 32 males, 12 females) with perianal fistula were included in this prospective study. The patients underwent conventional noncontrast, 2D sequences, diffusion-weighted imaging, followed by postcontrast, 2D T1 images in both axial and coronal planes, and 3D sequences at 3T. Acquisition times were recorded for each sequence. Each postcontrast sequence was evaluated in terms of image quality, presence of artifacts, fistula type, presence of an abscess, visibility, and number of internal orifices. The surgical findings were considered the gold standard. The imaging findings were compared with the surgical findings. Results In all three sequences, the fistula type and abscess were identified correctly in all patients. The sensitivity value for identification of ramifications utilizing CE 3D T1 VIBE sequence, CE 3D T1 SPACE, and CE 2D T1 images was 100, 86, and 36%, respectively. The number of internal orifices was identified by the CE 3D T1 VIBE and CE 3D T1 SPACE sequences in 100 and 92% of patients, respectively. CE 2D T1 images correctly identified internal orifices in 80% of patients. The overall scan time for each 3D sequence was shorter than for the combined postcontrast 2D sequences. Conclusion CE 3D T1 SPACE and CE 3D T1 VIBE sequences outperformed conventional CE 2D sequences in the evaluation of perianal fistulas in terms of visibility and the number of internal orifices with a shorter scanning time. Among the 3D sequences, CE 3D T1 VIBE is slightly superior to CE 3D T1 SPACE sequence.

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Section: Discussionmentioning

confidence: 99%

Comparison of Contrast-Enhanced 3D Imaging with 2D Imaging in the Evaluation of Perianal Fistula at 3T: A Prospective Observational Study

KV,

Arunachalam,

Sherene

et al. 2023

Indian J Radiol Imaging

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“…They have suggested that FS-T1-3D-VIBE offers greater diagnostic potential when evaluating the location of the internal opening, distance from the anal verge, clarity of the internal opening, and classi cation of stula tracks and complex stulas. 23 In this study, we used the superior m-DIXON sequence on the Philips 1.5 T MRI system to obtain T1WI water images (slice thickness 3 mm, slice spacing − 1.5 mm, voxel size 1 mm × 1 mm × 3 mm) and 3D sequences using the T2WI sequence (slice thickness 2 mm, slice spacing − 1 mm, voxel size 1 mm × 1 mm × 2 mm), resulting in higher-resolution images. The length of the adult anal canal is commonly known to be approximately 2.5 cm.…”

Section: Discussionmentioning

confidence: 99%

Preliminary utilization of high-resolution direct MRI fistulography with hydrogen peroxide in diagnosing anorectal fistula: A retrospective study

Chang,

Qiao,

Zhang

et al. 2024

Preprint

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Background Fistula-in-ano is an abnormal tunnel formation linking the anal canal with the perineum and perianal skin. Multiple imaging methods are available to evaluate it, among which magnetic resonance imaging (MRI) is the most advanced noninvasive preoperative method. However, it is limited in its visualization ability. Therefore, this study aimed to investigate the feasibility of using a specific mixture of 3% hydrogen peroxide (HP) and gadolinium as a direct contrast agent for high-resolution HPMRI of perianal fistula. Additionally, it investigated the value of this new method for preoperative examination of complex or recurrent fistula via a preliminary study. Methods Preoperative physical examination, conventional ultrasonography, MRI plain scan, and high-resolution direct HPMRI fistulography data from nine patients with surgically confirmed complex or recurrent fistula-in-ano were retrospectively analyzed. We also assessed the detection rates of fistula tracks and their associated internal openings, including the connection between them and the internal and external anal sphincters. Furthermore, the detection of perianal abscess was analyzed relative to the intraoperative observations. Results Surgical confirmation revealed nine cases of anal fistula, including 17 internal openings, 18 fistula tracks, 21 external openings, and six perianal abscesses. ROC curve analysis revealed that the effectiveness of the physical examination, conventional ultrasound, and MRI plain scans for detecting internal openings was lower than that of high-resolution direct HPMRI fistulography (Z = 3.739, 2.642, 2.642, all p < 0.05). The efficacy of physical examination and conventional ultrasound in detecting fistula tracks was lower than that of high-resolution direct HPMRI fistulography (Z = 2.394, 2.503, all p < 0.05). The effectiveness of physical examination in detecting perianal abscess was inferior to that of high-resolution direct HPMRI fistulography (Z = 3.417, p < 0.05). No statistically significant difference was observed in the ability of MRI plain scan to detect fistula tracks or in the capacity of conventional ultrasound to detect perianal abscesses than that of high-resolution direct HPMRI fistulography. Conclusions This novel high-resolution direct HPMRI fistulography technique enhances the visualization of recurrent and complex fistula-in-ano, enabling visualization of branched fistulas, thereby improving surgical outcomes.

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“…In addition, imaging of anal fistulas needs to be developed to increase the number of 3D sequences to better assist in clinical quality diagnosis. 3D imaging, with advantages including a higher SNR and reduced imaging time, provides thinner cross-sections and covers larger volumes without operator dependence when obliquely collecting images [ 18 ]. The usefulness of 3D T2WI imaging sequences in rectal cancer and female pelvis has been evaluated [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

“…A paired independent samples t -test was applied to compare the differences in the locations, SNRs, and CNRs between the ACS and control groups. The interrater reliability of the two radiologists was assessed by both weighted Kappa Coefficient [ 18 ] (Kappa value, κ＞0.8, excellent agreement; 0.60 ≤ κ ≤ 0.80, good agreement; 0.40 ≤ κ＜0.60, moderate agreement; 0.20 ≤ κ＜0.40, fair agreement; κ＜0.20, poor agreement) and Intraclass Correlation Coefficient [ 19 ] (ICCs, ICC＞0.90, excellent agreement; 0.75≤ ICC ＜0.9, good agreement; 0.5≤ ICC＜ 0.75, moderate agreement; ICC＜0.5, poor agreement). To determine the agreement of correct diagnostic effectiveness between ACS/control MRI and surgical results, the kappa statistic was used and the 95 % confidence intervals (CIs) was obtained.…”

Section: Methodsmentioning

confidence: 99%

An applicability study of rapid artificial intelligence-assisted compressed sensing (ACS) in anal fistula magnetic resonance imaging

Tang,

Peng,

Zhao

et al. 2024

Heliyon

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Comparison of contrast-enhanced fat-suppressed T1-3D-VIBE and T1-TSE MRI in evaluating anal fistula

Cited by 6 publications

References 26 publications

Comparison of Contrast-Enhanced 3D Imaging with 2D Imaging in the Evaluation of Perianal Fistula at 3T: A Prospective Observational Study

Comparison of Contrast-Enhanced 3D Imaging with 2D Imaging in the Evaluation of Perianal Fistula at 3T: A Prospective Observational Study

Preliminary utilization of high-resolution direct MRI fistulography with hydrogen peroxide in diagnosing anorectal fistula: A retrospective study

An applicability study of rapid artificial intelligence-assisted compressed sensing (ACS) in anal fistula magnetic resonance imaging

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